Stainless Steel Header Bolts for LS Engine Swap Exhaust Header Installation
When installing split flange headers on an LS swap project securing the exhaust flange properly is essential and these stainless steel header bolts deliver consistent clamp force under repeated thermal cycles. The 300 series stainless composition resists corrosion from road salts and preserves thread integrity even as temperatures exceed 500 F. Precision 12 point heads allow installers to advance fasteners with fine incremental control, reducing slippage in confined engine bays. A machined flange underside evenly distributes load across the split flange surface to prevent leaks without additional washers. Each bolt threads smoothly into LS pattern flanges, making installation straightforward and sustaining seal integrity through heat and vibration.
300 Series Stainless Steel Durability Under Thermal Stress
These header bolts are crafted from 300 series stainless steel, an alloy known for its balance of chromium and nickel content that delivers exceptional resistance to oxidation at temperatures beyond 500 °F. As exhaust gases heat and cool repeatedly, the metal's robust oxide barrier prevents scaling and preserves the smooth surface of each thread. In regions exposed to road salt or coastal humidity, this composition blocks corrosion and eliminates the common issue of bolts seizing in the flange pattern. Maintaining consistent clamp force through hundreds of heating cycles reduces the risk of exhaust leaks that can sap backpressure and trigger sensor errors. The long service life of these fasteners means removal and replacement require minimal effort, saving time during routine maintenance or system upgrades.
Twelve Point Head Geometry for Precision Torque Control
The twelve point head design doubles the number of engagement surfaces compared to a conventional six point bolt, allowing installers to apply torque in finer increments and reducing the chance of tool slippage in cramped engine compartments. With more contact points, the bolt head resists rounding even under high torque values, ensuring that mechanics can achieve the proper clamp load without special adapters. Precise torque control is vital when drawing split flange exhaust ports together, as uneven clamping can lead to warping or leaks at the mating surface. This geometry also helps distribute stress evenly across the bolt head, preventing localized deformation under vibration. Ultimately, accurate torque application supports a reliable seal and helps maintain consistent engine performance over thousands of miles.
Integrated Flange Design for Even Clamping Pressure
Each bolt features a precision machined flange underside that seats perfectly against split flange surfaces, spreading clamping force uniformly across the entire contact area. CNC machining to exact tolerances ensures perfect alignment with the LS header pattern, eliminating the need for separate washers or adhesives. As the engine cycles through heat spikes, the integrated flange and calibrated thread clearance lock the fastener in place, preventing loosening from constant vibration. Uniform head seating also reduces localized stress concentrations that could lead to fatigue or galling over time. By maintaining a consistent seal without retorquing, these bolts minimize maintenance intervals and enhance overall exhaust system reliability.
Exact Fitment for LS Split Flange Headers
Designed specifically for LS swap installations, these fasteners use a 13 mm head profile that accepts standard sockets and crowfoot tools, enabling quick engagement without adapters. The thread pitch and shank diameter match LS split flange patterns exactly, so each bolt threads smoothly and draws down evenly to full depth. This precise fit prevents cross threading and ensures full engagement of every thread turn for maximum mechanical integrity. Installation becomes a streamlined process, reducing frustration in tight engine bays and cutting overall labor time. Whether you are a professional builder or a home mechanic, these bolts deliver a reliable seal that stands up to heat, vibration, and repeated service cycles.
Engineered for a precise fit and lasting performance in your LS swap installation.